<?php

class CourseController extends Controller
{
	/**
	 * @var string the default layout for the views. Defaults to '//layouts/column2', meaning
	 * using two-column layout. See 'protected/views/layouts/column2.php'.
	 */
    public $layout = '//layouts/courseColumn';

	/**
	 * Declares class-based actions.
	 */
	public function actions()
	{
		return array(
			// captcha action renders the CAPTCHA image displayed on the contact page
			'captcha'=>array(
				'class'=>'CCaptchaAction',
				'backColor'=>0xFFFFFF,
				'minLength'=>4,
				'maxLength'=>4,
                'testLimit'=>1,
            ),
		);
    }

    /**
     * Display and modify course and course resources
     * @author : nonglei
     * @date   : 21/03/2014
     */
    public function actionView($id)
    {
        $modelFile = new Resources;
        /**
         * ajax to show the different course resources info
         */
        if(isset($_POST['ajax']))
        {
            $courseResource = CourseResources::model()->findByAttributes(array(
                'course_id'=>$_POST['course'],
                'resources_id'=>$_POST['resources'],
            ));
            $arr=array(
                'title'=>$courseResource->title,
                'content'=>$courseResource->content,
            );
            echo json_encode($arr); // {"a":1,"b":"b","c":true}
            return;
        }
        /**
         * Download resources file
         */
        if(isset($_POST['Download']))
        {
            $resoursesModel = Resources::model()->findByPk($_POST['Download']);
            $resoursesModel->download();
            return;
        }
        if(isset($_POST['Upload']) && !empty($_FILES['resourceFile']['name']))
        {
            $courseResource = new CourseResources;
            $modelFile->upload('resourceFile',yii::app()->params['upload_courseResource'],false);
            $courseResource->title = $_POST['title'];
            $courseResource->content = $_POST['content'];
            $courseResource->course_id = $id;
            $courseResource->resources_id = $modelFile->resources_id;
            $courseResource->status = 1;
            if(!$courseResource->save())
            {
                $modelFile->delete();
                throw new CHttpException("Upload Error!.");
            }
            else
            {
                echo "<script type=\"text/javascript\">alert(\"Upload Success\")</script>";
            }
        }
        if(isset($_POST['TeacherInfo']))
        {
            Course::model()->updateByPk($id,
                array('teacher_info'=>$_POST['TeacherInfo'])
            );
        }
	    if(isset($_POST['courseBrief']))
        {
            Course::model()->updateByPk($id,
                array('brief'=>$_POST['courseBrief'])
            );
        }
	    if(isset($_POST['courseContent']))
        {
            Course::model()->updateByPk($id,
                array('description'=>$_POST['courseContent'])
            );
        }
		$this->render('course',array(
            'model'=>$this->loadModel($id),
		));
	}

	/**
	 * Creates a new model.
	 * If creation is successful, the browser will be redirected to the 'view' page.
	 */
	public function actionCreate()
	{
		$model=new Course;

		// Uncomment the following line if AJAX validation is needed
		// $this->performAjaxValidation($model);

		if(isset($_POST['Course']))
		{
			$model->attributes = $_POST['Course'];
            $model->user_id = yii::app()->user->id;
            if($model->save())
				$this->redirect(array('view','id'=>$model->course_id));
		}

		$this->render('create',array(
			'model'=>$model,
		));
	}

	/**
	 * Updates a particular model.
	 * If update is successful, the browser will be redirected to the 'view' page.
	 * @param integer $id the ID of the model to be updated
	 */
	public function actionUpdate($id)
	{
		$model=$this->loadModel($id);

		// Uncomment the following line if AJAX validation is needed
		// $this->performAjaxValidation($model);

		if(isset($_POST['Course']))
		{
			$model->attributes=$_POST['Course'];
			if($model->save())
				$this->redirect(array('view','id'=>$model->course_id));
		}

		$this->render('update',array(
			'model'=>$model,
		));
	}

	/**
	 * Deletes a particular model.
	 * If deletion is successful, the browser will be redirected to the 'admin' page.
	 * @param integer $id the ID of the model to be deleted
	 */
	public function actionDelete($id)
	{
		$this->loadModel($id)->delete();

		// if AJAX request (triggered by deletion via admin grid view), we should not redirect the browser
		if(!isset($_GET['ajax']))
			$this->redirect(isset($_POST['returnUrl']) ? $_POST['returnUrl'] : array('admin'));
	}

	/**
	 * Lists all models.
	 */
	public function actionIndex()
	{
		$dataProvider=new CActiveDataProvider('Course');
		$this->render('index',array(
			'dataProvider'=>$dataProvider,
		));
	}

	/**
	 * Manages all models.
	 */
	public function actionAdmin()
	{
		$model=new Course('search');
		$model->unsetAttributes();  // clear any default values
		if(isset($_GET['Course']))
			$model->attributes=$_GET['Course'];

		$this->render('admin',array(
			'model'=>$model,
		));
	}

	/**
	 * Returns the data model based on the primary key given in the GET variable.
	 * If the data model is not found, an HTTP exception will be raised.
	 * @param integer $id the ID of the model to be loaded
	 * @return Course the loaded model
	 * @throws CHttpException
	 */
	public function loadModel($id)
	{
		$model=Course::model()->findByPk($id);
		if($model===null)
			throw new CHttpException(404,'The requested page does not exist.');
		return $model;
	}

	/**
	 * Performs the AJAX validation.
	 * @param Course $model the model to be validated
	 */
	protected function performAjaxValidation($model)
	{
		if(isset($_POST['ajax']) && $_POST['ajax']==='course-form')
		{
			echo CActiveForm::validate($model);
			Yii::app()->end();
		}
	}
}
